Merge glibc-ports into ports/ directory. glibc-2.16.90 glibc-2.16-ports-merge

1 files changed, 63 insertions, 0 deletions

diff --git a/ports/sysdeps/hppa/fpu/fesetenv.c b/ports/sysdeps/hppa/fpu/fesetenv.c
new file mode 100644
index 0000000000..e768bb2c37
--- /dev/null
+++ b/ports/sysdeps/hppa/fpu/fesetenv.c
@@ -0,0 +1,63 @@
+/* Install given floating-point environment.
+   Copyright (C) 1997, 1999, 2000, 2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by David Huggins-Daines <dhd@debian.org>, 2000
+   Based on the m68k version by
+   Andreas Schwab <schwab@suse.de>
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library.  If not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <fenv.h>
+
+int
+fesetenv (const fenv_t *envp)
+{
+  union { unsigned long long buf[4]; fenv_t env; } temp;
+  unsigned long long *bufptr;
+
+  /* Install the environment specified by ENVP.  But there are a few
+     values which we do not want to come from the saved environment.
+     Therefore, we get the current environment and replace the values
+     we want to use from the environment specified by the parameter.  */
+  bufptr = temp.buf;
+  __asm__ (
+	   "fstd,ma %%fr0,8(%1)\n"
+	   : "=m" (temp) : "r" (bufptr) : "%r0");
+
+  temp.env.__status_word &= ~(FE_ALL_EXCEPT
+			    | (FE_ALL_EXCEPT << 27)
+			    | FE_DOWNWARD);
+  if (envp == FE_DFL_ENV)
+    ;
+  else if (envp == FE_NOMASK_ENV)
+    temp.env.__status_word |= FE_ALL_EXCEPT;
+  else
+    temp.env.__status_word |= (envp->__status_word
+			       & (FE_ALL_EXCEPT
+				  | FE_DOWNWARD
+				  | (FE_ALL_EXCEPT << 27)));
+
+  /* Load the new environment. We use bufptr again since the 
+     initial asm has modified the value of the register and here
+     we take advantage of that to load in reverse order so fr0
+     is loaded last and T-Bit is enabled. */
+  __asm__ (
+	   "fldd,mb -8(%1),%%fr0\n"
+	   : : "m" (temp), "r" (bufptr) : "%r0" );
+
+  /* Success.  */
+  return 0;
+}
+libm_hidden_def (fesetenv)